Road scarifier



March 1 7, 1925.

G. C. CASSADA ROAD SCARIFIER Filed D60 2, 1923 2 Sheets-.-Sheet 1 I nvent or 62!. (05511101 6 K! We Hm I al March 1 1925. I 1,530,350

G. C- CASSADA ROAD SCARIFIER Filed Dec, 12, 1923 2 Sheets-Sheet 2 Patented Mar. 17, 1925.

PATENT OFFICE.

UNITED STATES enoaen o. GASSADA, or GALIon, onro, ASSIGNOR TO THE GALION IRON WORKS & MFG. 00., OF GALION, OHIO, A CORPORATION or OHIO.

ROAD soanrrrnn.

Application filed December 12, 1923. Serial No. 680,215

T 0 all whom it may concern:

Be it known that I, GEORGE C. GAssADA, citizen of the United States, residing at Galion, in the county of'Crawford and State of Ohio, have invented certain new and useful Improvements in Road Scarifiers, of which the following is a specification.

This invention relates to road scarifiers,

and particularly to those scarifiers wherein a transversely extending tooth carrying bar is disposed at the rear end of a tractor or road engine, means being provided for causing the depression or elevation of the bar so that the teeth, when the tooth carrying bar is depressed, will drag through the road surface and operate to tear up the surface. f

In machines of this character, the extent to which the picks orteeth will enter the ground is controlled by means of gauge wheels which limit the downward movement of the tooth carrying bar.

One of the objects of the present inven tion is to provide a construction ofthis character wherein the gauge wheels are mounteddirectly upon the ends of the tooth carrying bar and extensions are provided of the tooth carrying bar which extend laterally and rearward to a point behind the gauge wheels and carry scarifying teeth so that every portion of the roadway to the lateral edge, ditch or curbing'will be scarified.

A further object is to provide aconstruc tion of this character wherein the extensions which support scarifying teeth behind the gauge wheels are removable from the main tooth'carrying bar."

A still further object is to provide a construction of this character in which the lateral extensions heretofore referred to form part of the tooth clamping means of the main tooth carrying bar.

Another object is to provide means for supporting the lateral extensions of the main tooth carrying bar against the strain to which they are subjected and preventing their breakage or deformation under thisstrain.

Still another object of the invention is to provide a tooth carrying bar of the character stated wherein the gauge wheels are mounted directly upon said bar so as to move up and down therewith and so that the gauge wheels shall be supported at that point where the bar and its operating means is subjected to the greatest stress by reason of the striking of the wheel, against the pavement or roadway. i I

Other objects will appear in the course of the following description.

My invention isillustrated in the accompanying drawings, wherein Figure 1 is a fragmentary side elevation of the rear end of a road scarifier showing 1improved construction of the scarifying ar; Figure '2 is a fragmentary rear elevation ofthe construction shown in Figure 1;

Figure 3 is a rear elevation ofone end of the scarifying bar showing myattachnates a portion of the frame of a road en- 8 gine, which may be of any suitable construction and be either gasoline driven or steam driven, the detailed construction of the road engine'andtthe manner in which it is driven havingn0 part-in the present invention. Pivotally mountedon each side of the frame of the engine are arms 11 and 12, these arms beingpivoted at their forward ends and extending slightly beyond the rear end of the tractor or road engine and being free to move up and down. Connecting the arms 11 and 12 are vertical links 13 which are integral with the scarifying bar. 17. Passing" through the forks or bifurcations 12 ofthe arms 12'is a transverse rod or pin 14: which pivotally, connects the vertical links 13 to the arms 12. Theupper ends of the links 13 are pivotally connected to the arms 11 by means of the pins 15. The transverse pin or rod 14 passes through a plurality of ears 16'formed upon the transversely extending tooth carrying bar 17 whose detailed structure will be later stated, and the extremities of the transverse rod 01-pin let carry upon them the gauge wheels 18 which are intended to rest upon the surface of the roadway and travel therealon'g'"astliescarifier is drawn alongjthe roadway. The links 13' are preferably in the form of arms extending from and practically integral with the tooth carrying bar 17.

For the purpose of raising and lowering the scarifyin'g bar; a piston rod 19 is providediwhich operatively engagesthefibar 17 and which at its upper 'en'dcarries?a"piston operati'i igawithin a cylinder 20-: This cylin-; der is pivotally mounted upon' brackets pro= jecting from the frame ofthe machine, and means is providedwhereby compressed air; steam or' other: fluid under? pressure may be admitted to th'ewyl'ind'er to raise or lower the piston rod 16. I have not illustrated the particular construction ofthe cylinder 20 01' the'manner in which it' is mounted or the means whereby fluid is admitted to one end "or'tlie other of the cylinder for the purpose of raisingjor lowering the piston inasmuch as these fOI'llT'nO part of my present invention, and" furthermore because any other suitableconstruction could be used for this purpose. The piston rod 19 is preterabl-y pivoted" to the bar 17 by means of transversely extendingi-trunnion's 21. Thus it will be seen that by the construction which I have described thelteethcarried upon the bar 17 are always mainta-inedat the same angular inclinationregardless of their eleva tion so that the-directions in which they are projected intothe ground will be the same: at a'll'i mesFor; in-otheiv words, the teeth: are supported atthesame-t=in'clination throughout their entire :path' 3 of movement:

Thetoot-h: carrying bar 17= preferably formed of an approximately. T-sh'ap'e'd beamhavingafn' underfsurtace which is'dispose'd normally at an' upward and rearward inclina-tion'; The lower edge" of this bar is" formed with a series of approximately V shaped sockets 22 and ooacting; with: the bar and particularly with'ithese:sockets, are a series of pairs of clamping members- 23, each formed with \l' shap'ed notch or socket in' its face confrontingithe ;V-shaped notchor socket 22-01 the bar 17. These clamping members123 are: engaged with; the bar 17 by means of bolts 24 so that: teeth or picks 25, which areapproximatelyrec tangular in cross section maysbezdisposed between the clamping" members and the socket formedup'onithe: pick carrying bar. These teethmay be*adjusted inward or out ward as desired and are held firmly clamped in' -pla'ce by" the two sets of bolts*24;. The two outside teeth at eac'he'nd of the' bar. 17 are notflheld iii-pla ce: by the clamps 23: but are held invplace'by clampswhich teem-part of: a laterally" ext'ei'idiin'g pick-marrying bracket or extension 26. This laterally ex- 'CBIlCllligilOlfl'C-kt or extension is illustrated in detail in Figures 3 to 5. Each extension comprises a flat plate 27. The upper face of this plateisprovided' with a plurality of "pairs'of"'upwardlyextending lugs 28 V shaped in cross section to provide sockets coacting with the sockets 22 of the bar 17 and supportingthe picks 25 therein. From the under face of this plate extends a web 29 which extends downward;rearward and laterally, as illustrated most clearly in Figure 5ytll=Xtf6Hllt-Y of this web being disposed ?in-a: 'plane'vapproximatcly parallel to the 'plane0t the: plate 27 and normally in a plane at "an-inclination to the-surface of the roadway.- This flattened extremity 30 is formed with the downwardly extending lugs 31, theinner faces of which are beveled so as to provide a V-shaped socket-between the lugs and coacting with this flattened endi30are the-clamping plates 32 which are also formedwitlrV-shaped sockets in their upper faces andwhich-are; held in place to grip" a tooth between theclamping plate and the flattened portion 30 ofthe bracketby means-o f'the bolts 33-. Itwillbe seen that there are four of these bolts and two ofthe platesi32', andthat the-tooth or pick 25 will befirmly gripped in-place between these lugs: and heldlfrom any longitudinal or lateral movement; r

The Web 29 isnf-ormed with alaterally projecting, relatively deeplribBd which is cutout at its=m-iddle,uas 211K355, to lighten the structure without reducing; its strength. The web 29-is also formed with adownwardly dep'endingg lugg36-justbelow the web'i34 ancbhaving airiaperturel-tor the passage; of aw-rod or'-bolt:37., Each bolt' 37- at itsextreinity is angularl-y bent at; 38- and inserted in an. aperture in" the'send :lug'. of the 'I baI' or tooth?carryingwbaras17. The other end passes through the aperture 36 and is screwsthreadedifor: engagement by nuts 39 and by a -lo'ck--'-nutr(lt): which will hold the supporting;rod" in firm: engagement with the bracket;

This constructioni supports the end picks of the series o'l teeth" or picks immediately behind-and in alignment with the wheels 18 sothat: the's'roadway"to; the curbing; gut ter lineori to theextreme side of the road may be turned--up1 and scaritied. If the picks 'were not disposed behind the wheel 18 it" is obvious-that a portion of the roadway tone each side adjacent the curb or gutter 'wou'ldi have to: be scar-ified by hand or separately; With this construction the operator can run the wheels 18 alongthc line of the gutter, curbing or road margin and at: the same time be---sure that the picks are scarifyingthe surface ofi-the road to the extreme matgidthereof; Furthermore, it will be. seen: that these; lateral extensions are supported against strain not only by their relatively heavy and rigid construction but by the supporting rods 37. I f f It isalso to be noted that the parallel motion which I have provided and which supports the picks at all, times at a certain definite. inclination without regard to whether the picks are elevated or depressed is particularly necessary where rearward extensions are used for the support of picks immediately behind the wheels, as otherwise these picks so supported behind the wheels would strike the ground first and would enter more deeply into the ground than the'picks immediately in front thereof. Furthermore, the mounting of the wheels upon the transverse pin or rod 14: places these wheels in such position that they will more effectually sustain the shock of striking the ground than they would otherwise do. V c

In the operation of this device, it will be seen that when the piston rod 16 is moved downward, the bar 17 will be moved downward, the arms 11 and 12 and the link 13 swinging upontheir pivots and having a parallel motion which will maintain the picks or teeth at the same angular inclination regardless of their elevation. Then the picks are forced downward they will enter the ground in an inclined direction and owing to the fact that the whole mechanism is traveling along the ground, these picks will operate to tear up the surface,

the gauge wheels, of course, engaging the surface of the ground and controlling the depth of penetration of the picks so that the surface of the roadway to a uniform depth will be turned up. There is, of course, considerable strain upon the axles of these gauge wheels but it is pointed out that the axle of the gauge wheel is very rigidly supported at intervals along the entire length of the tooth carrying bar and thus the structure will have sufficient rigidity to stand any strain to which the mechanism is liable to be subjected. If for any reason it isvnot desired to use the lateral picks, that is those picks which are disposed behind the gauge wheels, they may be readily removed and ordinary clamping devices such as shown at 2-3 and 24 used for the two end sockets of the pick-carrying bar to support the two end picks on each side.

lVhile I have illustrated a construction which has been found to be thoroughly ef fective in practice, which. is strong, rigid and which will not give under the very heavy strain to which it is subjected, I do not wish to be limited thereto as it is obvious that many details might be changed without departing from the spirit of the invention.

I claim:-

1. In a scarifier, a tooth carrying bar, arms pivoted at one end and pivotally connected at their opposite ends to said bar and connected for parallel movement, a series of clamps mounted upon the tooth carrying bar, teeth supported by said clamps, gauge wheels associated with said bar and moving therewith and limiting the downward movement of the bar, and members constituting detachable teeth clamps for the bar and extending laterally and rearwardly behind said wheels and having teeth engaging clamps formed thereon. 2. In a scarifier, a tooth carrying bar mounted for'vertical movement, means for forcing the bar downward, wheels operatively supported at the ends of the bar and limiting its downward movement, the bar being formed to provide on its under face a series of tooth engaging sockets, clamping members coacting with these sockets, a bracket disposed at each end of the bar, the bracket being formed to provide a plate at one end formed with tooth engaging sockets coacting with the end sockets of the bar, said bracket extending laterally, downwardly and rearwardly and at its extremity being formed to provide a plate having a tooth engaging socket, clamping members coacting with the sockets on said plate and adapted to clamp a tooth in position between'the extremity of each bracket and the clamping member, and a strain supporting member operatively connected to each end of the bar and to each bracket adjacent the extremity thereof. V

3. As an article of manufacture, a tooth holding-bracket adapted to be used in connection with a tooth carrying bar, said bracket being formed to provide a plate at one end adapted to confront the extremity of the scarifying bar and to provide a rearwardly, laterally and downwardly extending web terminating in a plate-like member, means for engaging the first named plate to the extremity of the scarifying bar, and means for mounting a tooth upon the opposite end of said bracket whereby said tooth may be supported rearward of a ground-engaging wheel;

4:. The combination with a scarifier bar and means for elevating or depressing the bar, of a transversely extending rod mounted upon the scarifying bar and projecting beyond the ends of the same wheels mounted upon the ends of said rod, teeth mounted on the scarifying bar, brackets disposed at each end of the sca'rifying bar and detachably engaged therewith and extending downward and rearward to a point behind said wheels, means on the extremities of said brackets whereby teeth may be supported immediately behind said wheels, and a supporting rod for each bracket, each rod at one end being formed to engage the tooth carrying bar and at its other end having adjustable detachable engagement with the bracket.

5." The. combination. with a scarifier bar and. means i for elevating or depressing; the bar, ofa transversely extending rod mounted" upon the sca rifying bar and projecting beyond the ends of the same wheels mounted upon'thexends of said-rod, teeth mounted on the soarifiying bar, brackets disposed at each end ofpthe scarifyingbar andv detachably engaged therewith and extending. downward and rearward toa point behindsa-id wheels, means. on the extremitiesof saidi brackets whereby teeth may be supported immediately behind said: wheels, a supporting rodfor each bracket, each rod at one end being formed: to engage the tooth carrying bar and at itsother-end haying adjustable detachable engagementwwith the'bracket, the bracket having a perforated lug through which said rod passes, and nuts on the rod whereby the bracket may be rigidly engaged with; the rod.

6. In asca-rifier, a toothicarrying member; downwardly projecting teeth thereon, a. rearw-ardly extending tooth carrying meme ber-"ca-rried by and movable-with the main tooth carrying member, means for elevat ing and depressing the maintooth carrying member, and means for holding the main and rearwardly extending *tooth carrying members always in: such relation that-the teeth carried thereby shall bealways inv the same-horizontal plane and the teeth at the same angle to the ground throughout their path. of movement.

7. In a scarifier, a tooth. carrying bar, teeth thereon, means for raising and lowering said bar, rearwardlyand laterally extending toothcarrying members mounted on the bar and movable therewith, and means for holding the tooth carrying ,bar in such position throughout its path of movement that the teeth carried therebyiand by the rearwardly and laterally projecting mm hers shall be always disposedf'in, the-same horizontal plane and at the same angle to the ground throughout their path o'fi movement.

In testimony whereof- I aflix my signature.

GEORGE C. .CASSADA. 

